An adult takes 500 milligrams (mg) of ibuprofen. Each hour, the amount of ibuprofen in the person's system decreases by one-fifth. Write the function that models the exponential change between the number of hours, t, and the number of milligrams of ibuprofen remaining in the person's system, m(t). Om(t) = 500-5t Om(t) = -500-5t Om(t)=500. °·(²)* Om(t)=-500- ·(²³)*

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